import router from './routers'
import store from '@/store'
import Config from '@/settings'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css'// progress bar style
import { getToken } from '@/utils/auth' // getToken from cookie
import { buildMenus } from '@/api/system/menu'
import { filterAsyncRouter } from '@/store/modules/permission'

NProgress.configure({ showSpinner: false })// NProgress Configuration

router.beforeEach((to, from, next) => {
  const isAuth = to.meta.isAuth
  if (to.meta.title) {
    document.title = to.meta.title + ' - ' + Config.title
  }
  NProgress.start()
  if (getToken()) {
    // 已登录且要跳转的页面是登录页
    if (to.path === '/login') {
      next({ path: '/dashboard' })
      NProgress.done()
    } else {
      if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息
        loadDist()
        store.dispatch('GetInfo').then(res => { // 拉取user_info
          // 动态路由，拉取菜单
          loadMenus(next, to)
        }).catch(() => {
          store.dispatch('LogOut').then(() => {
            location.reload() // 为了重新实例化vue-router对象 避免bug
          })
        })
      // 登录时未拉取 菜单，在此处拉取
      } else if (store.getters.loadMenus) {
        // 修改成false，防止死循环
        store.dispatch('updateLoadMenus').then(res => {})
        loadMenus(next, to)
        loadDist()
      } else {
        next()
      }
    }
  } else {
    /* has no token*/
    if (isAuth) { // 在免登录白名单，直接进入
      next()
    } else {
      // 否则全部重定向到登录页
      let url = `/login?redirect=${to.path}`
      url += queryUrl(to.query)
      next(url)
      NProgress.done()
    }
  }
})

export const loadMenus = (next, to) => {
  buildMenus().then(res => {
    const asyncRouter = filterAsyncRouter(res)
    asyncRouter.push({ path: '*', redirect: '/404', hidden: true, isAuth: false })
    store.dispatch('GenerateRoutes', asyncRouter).then(() => { // 存储路由
      router.addRoutes(asyncRouter) // 动态添加可访问路由表
      next({ ...to, replace: true })
    })
  })
}

export const loadDist = () => {
  store.dispatch('intiDict').then(() => {
    console.log('........... init dict success')
  })
}

router.afterEach(() => {
  NProgress.done() // finish progress bar
})

// 跳转登录页面时额外参数处理
const queryUrl = (query) => {
  if (!query) return
  let params = ''
  for (const key in query) {
    // redirect是登录后需要打开的页面，不能被覆盖
    if (key === 'redirect') continue
    params += `&${key}=${query[key]}`
  }
  return params
}
